Hungarian grounding stitch
For the first row, all the stitches are over four threads of canvas. Begin by making the first vertical stitch over four threads. Make the next parallel stitch the same size one thread to the right and one thread up.
Repeat for the third stitch. The fourth stitch is down one canvas thread. Repeat for the next stitch. Continue in this pattern for the width of the area.
For the second row, all the stitches are over two threads of canvas. Directly under the highest stitch in the first row make a stitch. Then make one to either side of this, again directly under the row above.
Finally make a fourth stitch under the first of this group, to make a diamond. With two canvas threads spacing between each, repeat the diamond pattern across the row.
Structure of stitch
Identifying Hungarian grounding stitch
This two-part wavy stitch is made up of vertical stitches of different lengths.
Various Authors, The Royal School of Needlework Book of Embroidery (2018) , p.112